Classification:

Reference:

Date:

EM16-006a

ITB17-004a

March 28, 2018

2016-2017 Q50 AND 2017 Q60; ACCESSORY DRIVE BELT NOISY
OR HAS COME OFF
This bulletin has been amended to add 2017 Q50 to the Title, Applied Vehicles, and Applied VIN and Date. No other
changes have been made. Please discard previous version of this bulletin.

APPLIED VEHICLES:

2016-2017 Q50 (V37)
2017 Q60 (V37)
APPLIED VIN AND DATE: 2016 Q50 (V37) All
2017 Q50 (V37)
Built before:
JN1EV7AP(*)HM 731871 / September 7, 2016
RWD
JN1FV7AP(*)HM 850227 / September 7, 2016
JN1EV7AR(*)HM 832718 / September 7, 2016
AWD
JN1FV7AR(*)HM 870451 / September 7, 2016
2017 Q60 (V37)
Built before:

JN1EV7EK(*)HM 360095 / May 27, 2016
JN1FV7EK(*)HM 610102 / May 27, 2016
JN1EV7EL(*)HM 550025 / May 27, 2016
AWD
JN1FV7EL(*)HM 700062 / May 27, 2016
VR30DDTT (V6 Twin Turbo Engine)
NOTE: Does not apply to Hybrid models
RWD

APPLIED ENGINE:

IF YOU CONFIRM
The accessory drive belt is noisy.
or
The accessory drive belt has come off of the idler pulley.
ACTION


If the accessory drive belt is currently only noisy, check it’s alignment with the procedure starting on
page 3.



If the accessory drive belt has come off of the idler pulley, first repair the accessory drive belt and any
collateral damage caused by the belt, and then Proceed to Re-align A/C Compressor on page 6.

IMPORTANT: The purpose of ACTION (above) is to give you a quick idea of the work you will be performing.
You MUST closely follow the entire SERVICE PROCEDURE as it contains information that is essential to
successfully completing this repair.
Infiniti Bulletins are intended for use by qualified technicians, not 'do-it-yourselfers'. Qualified technicians are properly trained
individuals who have the equipment, tools, safety instruction, and know-how to do a job properly and safely. NOTE: If you believe
that a described condition may apply to a particular vehicle, DO NOT assume that it does. See your Infiniti retailer to determine if this
applies to your vehicle.
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Flow Chart

The accessory drive belt is noisy.
Or
The accessory drive belt has come off of the idler pulley.

Has the accessory belt come OFF of
the idler pulley?
NO

YES

Repair the accessory belt and any
collateral damage caused by the
belt


Proceed to Check Accessory Drive
Belt Alignment on page 3.

Refer to the Electronic Service
Manual (ESM) for component
specific repair information.

Proceed to Re-align A/C Compressor
on page 6.

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ITB17-004a

SERVICE PROCEDURE

Check Accessory Drive Belt Alignment
1. Access the idler pulley by hand.
NOTE: The idler pulley can be reached from the driver’s side of the engine compartment between the
radiator and the front of the engine as shown in Figure 1 and Figure 2.

Figure 1

Idler pulley

Figure 2
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ITB17-004a

Front edge of
accessory belt
2. Measure the gap from the front edge of the belt to
the front edge of the idler pulley shown in Figure 3
as follows:
a. Cut out a 1 inch square piece of paper.

Front edge of
idler pulley

NOTE: sticky note can be used.

Figure 3

Idler pulley
b. Align the paper to the front edge of belt
(Figure 3 and Figure 4).

1 inch square
piece of paper

c. While holding the paper up against the edge of
the belt, press the paper into the edge of the
idler pulley to mark the paper.
Figure 4

d. Remove the paper and measure the distance
from the belt to the mark that was just
imprinted on the paper.

Idler pulley
edge mark

Side against
belt

Figure 5

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ITB17-004a

3. Is the distance of the belt 3.5 mm or more from the front edge of the pulley?
YES: No adjustment required at this time.


Refer to the ESM, section EM – Engine Mechanical for further diagnostic information.

NO: Proceed to Re-align A/C Compressor.

OK

NG
Belt needs to
be re-aligned

3.5 mm or more

Figure 6

Figure 7

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ITB17-004a

Re-align A/C Compressor

1. Remove Air Duct (inlet) shown in Figure 8.
2. Remove Air cleaner body (bank 2).
3. Remove Air cleaner cover (bank 2).
4. Remove Air duct (bank 2).

Figure 8

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ITB17-004a

5. Remove the accessory drive belt.


Refer to the ESM, section EM – Engine Mechanical for removal information.

6. Discharge the A/C refrigerant.


Refer to the ESM, section HA – Heating & Air Conditioning System for information on discharging
the A/C system.
High pressure
hose

Nut

7. Remove the nut holding the high pressure hose to
the A/C compressor and then disconnect the high
pressure hose.
NOTE: Do not remove the low pressure hose.
A/C
compressor

Figure 9
8. Loosen the front two (2) A/C compressor mounting bolts shown in Figure 10.


Do not remove the A/C compressor mounting bolts when loosening.

9. Loosen the single rear A/C compressor mounting bolt shown in Figure 10.
Step 9

Step 6

Figure 10
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ITB17-004a

10. Move the A/C compressor up and down to free it from the engine assembly.

11. Push the A/C compressor toward the rear of the vehicle.

12. While holding the A/C compressor toward the rear of the vehicle, tighten the A/C compressor mounting
bolts in the order shown in Figure 11 to 5 N•m, (0.51 kg-m, 44 in-lb).
NOTE: Take care not to move the A/C compressor until the final torqueing of the bolts in the next step.

13. Torque the A/C compressor mounting bolts to 30.9 N•m, (3.2 kg-m, 23 ft-lb) in the order shown in
Figure 11.

1

3
2

Figure 11

14. Re-assemble the vehicle in the reverse order of disassembly.

15. Recharge A/C refrigerant.


Refer to the ESM, section HA – Heating & Air Conditioning System for information on recharging the
A/C system.
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ITB17-004a

PARTS INFORMATION
DESCRIPTION

PART NUMBER

QUANTITY

Accessory Drive Belt

11720-5CA0A

1, If Needed

CLAIMS INFORMATION
DESCRIPTION

PFP

OP CODE

SYM

DIA

FRT

Align A/C compressor (Includes A/C
Evacuate and Recharge)

(1)

TX48AA

ZL

32

1.8

(1) Refer to the electronic parts catalog (FAST or equivalent) and use the appropriate A/C Compressor part
number (92600-XXXXX) as the primary failed part.

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ITB17-004a